docs: def load(self, config, file_object, prefer=None):
          """ An abstract method that loads from a given file object.
  
          :param class config: The config class to load into
          :param file file_object: The file object to load from
          :param str prefer: The preferred serialization module name
          :returns: A dictionary converted from the content of the given file object
          :rtype: dict
          """
  
          return self.loads(config, file_object.read(), prefer=prefer)